水稻千粒重与垩白粒率的相关性分析

Correlation between 1000-grain weight and chalky rice rate of indica rice

本研究选用目前生产上使用的一些主要的籼型杂交水稻不育系、恢复系和杂交组合为材料,测定了千粒重、垩白粒率以及二者的相关性。不育系、恢复系和杂交组合的垩白粒率与千粒重都极显著正相关,降低千粒重是减少垩白粒率的一条有效途径。提出了在重庆生态条件下选育垩白粒率符合新国颁标准的杂交水稻,其不育系、恢复系和杂交组合的千粒重应分别小于21 2、26 1、23 1g。

Using the indica hybrid combinations,B lines and R lines as test material,the 1000-grain weight and chalky rice rate were surveyed and their correlations were analyzed.The correlations between 1000-grain weight and chalky rice rate were positively significant. Decrease of 1000-grain weight will be helpful to reduce the chalky rice rate,In Chongqing,to meet the new Chinese rice quality standard for the chalky rice rate,the 1000-grain weight of hybrid combinations,B lines and R lines should be lower than 23.1,21.2 and 26.1g,respectively.